package com.itheima.filter;

import ch.qos.logback.classic.turbo.TurboFilter;
import com.alibaba.fastjson.JSON;
import com.itheima.common.BaseContext;
import com.itheima.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


@Slf4j
@WebFilter(filterName = "LoginFilter",urlPatterns = "/*")
public class LoginCheckFilter implements Filter {
    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        String requestURI = request.getRequestURI();
        log.info("拦截请求-->" + request.getRequestURI());
        //不用处理的请求路径
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/user/sendMsg",
                "/user/login"
        };

        boolean check = check(urls, requestURI);

        if (check){
            log.info("本次请求无需处理");
            filterChain.doFilter(request,response);
            return;
        }

        if (request.getSession().getAttribute("employee") != null) {
            log.info("用户已登陆,id为:" + request.getSession().getAttribute("employee"));

            BaseContext.setCurrentId((Long) request.getSession().getAttribute("employee"));

            filterChain.doFilter(request,response);
            return;
        }

        if (request.getSession().getAttribute("user") != null) {
            log.warn("11111111111111111");
            log.info("用户已登陆,id为:" + request.getSession().getAttribute("user"));

            BaseContext.setCurrentId((Long) request.getSession().getAttribute("user"));

            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录!!!");
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));

        return;
    }

    public boolean check(String[] urls, String requestUri){
        for (String url : urls) {
            boolean flag = PATH_MATCHER.match(url, requestUri);
            if (flag){
                return true;
            }
        }

        return false;

    }



}
